Vaillant ecotech 937 noise

[Andyk78]

Hello all,

My boiler has developed a funny noise that can only be described as like when you finish a drink through a straw and suck up the last bit from the bottom.. that noise?
The noise is coming from underneath the boiler and inky does this when the hit water is on and seems to make the noise note so once the hot water tap is then turned back off again... I have yet to test is it does it with the central heating on
I have put a video on youtube if anyone could have a listen and kindly offer advice on what this noise may be?

Many thanks in advance.

 

[Andyk78]

Anyone?

 

[assuhors]

You might get a reply on the plumbing and heating forum.

 

[picasso]

Have you noticed any reduction on the hot water flow ?

 

[Andyk78]

Have you noticed any reduction on the hot water flow ?

Thanks, no the flow seems the same and the pressure is ok